以编程方式在xcode / ios中编辑RTF / DOC文件

我有一个RTF文件，我可以在iphone上查看，现在我需要编程编辑文件，请让我知道我该怎么做。 示例RTF文件内容“我是StackOverflow的新手”现在我需要通过编程切换到下面的行。 “我经常访问StackOverflow”并保存为PDF文件。 请帮助我:)

提前致谢 ：）

Answer 1

在.h文件中添加一些对象并进行定义

#define kBorderInset 20.0 #define kBorderWidth 1.0 #define kMarginInset 10.0 @interface ViewController : UIViewController { CGSize pageSize; NSString *pdfFileName; NSString *contents_for_pdf; } - (void)generatePdfWithFilePath:(NSString *)thefilePath; 

在.m文件中添加这行一些在button上单击以获取rtf文件的内容在string中

 NSString *rtf_path = [[NSBundle mainBundle] pathForResource:@"example" ofType:@"rtf"]; contents_for_pdf = [[NSString alloc] initWithContentsOfFile:rtf_path encoding:NSUTF8StringEncoding error:nil]; NSLog(@"%@",contents_for_pdf); contents_for_pdf = [contents_for_pdf stringByReplacingOccurrencesOfString:@"I am new to StackOverflow" withString:@"I regularly visit StackOverflow"]; pageSize = CGSizeMake(612, 792); NSString *fileName = @"Demo.pdf"; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; pdfFileName = [documentsDirectory stringByAppendingPathComponent:fileName]; [self generatePdfWithFilePath:pdfFileName]; 

我没有修改rtf文件的文本，我只是在rtf文件中使用相同的文本。你应该做你想做的（我注意到在文本中的一些编码字符）和function，将生成PDF格式在这里。

 - (void) generatePdfWithFilePath: (NSString *)thefilePath { UIGraphicsBeginPDFContextToFile(thefilePath, CGRectZero, nil); //Start a new page. UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, pageSize.width, pageSize.height), nil); //Draw text fo our header. CGContextRef currentContext = UIGraphicsGetCurrentContext(); CGContextSetRGBFillColor(currentContext, 0.0, 0.0, 0.0, 1.0); UIFont *font = [UIFont systemFontOfSize:14.0]; CGSize stringSize = [contents_for_pdf sizeWithFont:font constrainedToSize:CGSizeMake(pageSize.width - 2*kBorderInset-2*kMarginInset, pageSize.height - 2*kBorderInset - 2*kMarginInset) lineBreakMode:UILineBreakModeWordWrap]; CGRect renderingRect = CGRectMake(kBorderInset + kMarginInset, kBorderInset + kMarginInset + 50.0, pageSize.width - 2*kBorderInset - 2*kMarginInset, stringSize.height); [contents_for_pdf drawInRect:renderingRect withFont:font lineBreakMode:UILineBreakModeWordWrap alignment:UITextAlignmentLeft]; UIGraphicsEndPDFContext(); UIAlertView *Alert = [[UIAlertView alloc] initWithTitle:@"PDF Created" message:@"Sucessfull" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil, nil]; [Alert show]; }